Bumping gaia.json for 1 gaia-1_2 revision(s) a=NPOTB

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https://hg.mozilla.org/integration/gaia-1_2/rev/8c84c1a89df3
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #12253 from nullaus/agps-unit-tests

bug 891732 - AGPS/SUPL Operator Variant Unit Tests. r=jaoo